Dynamic sea surface height anomaly above the geoid, suitable for comparisons with altimetry sea surface height data products that apply the inverse barometer (IB) correction. Note: SSH is calculated by correcting model sea level anomaly ETAN for three effects: a) global mean steric sea level changes related to density changes in the Boussinesq volume-conserving model (Greatbatch correction, see sterGloH), b) the inverted barometer (IB) effect (see SSHIBC) and c) sea level displacement due to sea-ice and snow pressure loading (see sIceLoad). SSH can be compared with the similarly-named SSH variable in previous ECCO products that did not include atmospheric pressure loading (e.g., Version 4 Release 3). Use SSHNOIBC for comparisons with altimetry data products that do NOT apply the IB correction.
valid_min :
[-1.88057721]
valid_max :
[1.42077196]
[259200 values with dtype=float32]
SSHIBC
(time, latitude, longitude)
float32
...
coverage_content_type :
modelResult
long_name :
The inverted barometer (IB) correction to sea surface height due to atmospheric pressure loading
units :
m
comment :
Not an SSH itself, but a correction to model sea level anomaly (ETAN) required to account for the static part of sea surface displacement by atmosphere pressure loading: SSH = SSHNOIBC - SSHIBC. Note: Use SSH for model-data comparisons with altimetry data products that DO apply the IB correction and SSHNOIBC for comparisons with altimetry data products that do NOT apply the IB correction.
valid_min :
[-0.3014482]
valid_max :
[0.52456337]
[259200 values with dtype=float32]
SSHNOIBC
(time, latitude, longitude)
float32
...
coverage_content_type :
modelResult
long_name :
Sea surface height anomaly without the inverted barometer (IB) correction
units :
m
comment :
Sea surface height anomaly above the geoid without the inverse barometer (IB) correction, suitable for comparisons with altimetry sea surface height data products that do NOT apply the inverse barometer (IB) correction. Note: SSHNOIBC is calculated by correcting model sea level anomaly ETAN for two effects: a) global mean steric sea level changes related to density changes in the Boussinesq volume-conserving model (Greatbatch correction, see sterGloH), b) sea level displacement due to sea-ice and snow pressure loading (see sIceLoad). In ECCO Version 4 Release 4 the model is forced with atmospheric pressure loading. SSHNOIBC does not correct for the static part of the effect of atmosphere pressure loading on sea surface height (the so-called inverse barometer (IB) correction). Use SSH for comparisons with altimetry data products that DO apply the IB correction.
valid_min :
[-1.66542721]
valid_max :
[1.4550364]
[259200 values with dtype=float32]
acknowledgement :
This research was carried out by the Jet Propulsion Laboratory, managed by the California Institute of Technology under a contract with the National Aeronautics and Space Administration.
author :
Ian Fenty and Ou Wang
cdm_data_type :
Grid
comment :
Fields provided on a regular lat-lon grid. They have been mapped to the regular lat-lon grid from the original ECCO lat-lon-cap 90 (llc90) native model grid. SSH (dynamic sea surface height) = SSHNOIBC (dynamic sea surface without the inverse barometer correction) - SSHIBC (inverse barometer correction). The inverted barometer correction accounts for variations in sea surface height due to atmospheric pressure variations.
Conventions :
CF-1.8, ACDD-1.3
coordinates_comment :
Note: the global 'coordinates' attribute describes auxillary coordinates.
creator_email :
ecco-group@mit.edu
creator_institution :
NASA Jet Propulsion Laboratory (JPL)
creator_name :
ECCO Consortium
creator_type :
group
creator_url :
https://ecco-group.org
date_created :
2020-12-18T09:39:51
date_issued :
2020-12-18T09:39:51
date_metadata_modified :
2021-03-15T22:07:49
date_modified :
2021-03-15T22:07:49
geospatial_bounds_crs :
EPSG:4326
geospatial_lat_max :
[90.]
geospatial_lat_min :
[-90.]
geospatial_lat_resolution :
[0.5]
geospatial_lat_units :
degrees_north
geospatial_lon_max :
[180.]
geospatial_lon_min :
[-180.]
geospatial_lon_resolution :
[0.5]
geospatial_lon_units :
degrees_east
history :
Inaugural release of an ECCO Central Estimate solution to PO.DAAC
NASA Physical Oceanography, Cryosphere, Modeling, Analysis, and Prediction (MAP)
project :
Estimating the Circulation and Climate of the Ocean (ECCO)
publisher_email :
podaac@podaac.jpl.nasa.gov
publisher_institution :
PO.DAAC
publisher_name :
Physical Oceanography Distributed Active Archive Center (PO.DAAC)
publisher_type :
institution
publisher_url :
https://podaac.jpl.nasa.gov
references :
ECCO Consortium, Fukumori, I., Wang, O., Fenty, I., Forget, G., Heimbach, P., & Ponte, R. M. 2020. Synopsis of the ECCO Central Production Global Ocean and Sea-Ice State Estimate (Version 4 Release 4). doi:10.5281/zenodo.3765928
source :
The ECCO V4r4 state estimate was produced by fitting a free-running solution of the MITgcm (checkpoint 66g) to satellite and in situ observational data in a least squares sense using the adjoint method
standard_name_vocabulary :
NetCDF Climate and Forecast (CF) Metadata Convention
summary :
This dataset provides monthly-averaged dynamic sea surface height interpolated to a regular 0.5-degree grid from the ECCO Version 4 Release 4 (V4r4) ocean and sea-ice state estimate. Estimating the Circulation and Climate of the Ocean (ECCO) state estimates are dynamically and kinematically-consistent reconstructions of the three-dimensional, time-evolving ocean, sea-ice, and surface atmospheric states. ECCO V4r4 is a free-running solution of a global, nominally 1-degree configuration of the MIT general circulation model (MITgcm) that has been fit to observations in a least-squares sense. Observational data constraints used in V4r4 include sea surface height (SSH) from satellite altimeters [ERS-1/2, TOPEX/Poseidon, GFO, ENVISAT, Jason-1,2,3, CryoSat-2, and SARAL/AltiKa]; sea surface temperature (SST) from satellite radiometers [AVHRR], sea surface salinity (SSS) from the Aquarius satellite radiometer/scatterometer, ocean bottom pressure (OBP) from the GRACE satellite gravimeter; sea-ice concentration from satellite radiometers [SSM/I and SSMIS], and in-situ ocean temperature and salinity measured with conductivity-temperature-depth (CTD) sensors and expendable bathythermographs (XBTs) from several programs [e.g., WOCE, GO-SHIP, Argo, and others] and platforms [e.g., research vessels, gliders, moorings, ice-tethered profilers, and instrumented pinnipeds]. V4r4 covers the period 1992-01-01T12:00:00 to 2018-01-01T00:00:00.
Dynamic sea surface height anomaly above the geoid, suitable for comparisons with altimetry sea surface height data products that apply the inverse barometer (IB) correction. Note: SSH is calculated by correcting model sea level anomaly ETAN for three effects: a) global mean steric sea level changes related to density changes in the Boussinesq volume-conserving model (Greatbatch correction, see sterGloH), b) the inverted barometer (IB) effect (see SSHIBC) and c) sea level displacement due to sea-ice and snow pressure loading (see sIceLoad). SSH can be compared with the similarly-named SSH variable in previous ECCO products that did not include atmospheric pressure loading (e.g., Version 4 Release 3). Use SSHNOIBC for comparisons with altimetry data products that do NOT apply the IB correction.
The inverted barometer (IB) correction to sea surface height due to atmospheric pressure loading
units :
m
comment :
Not an SSH itself, but a correction to model sea level anomaly (ETAN) required to account for the static part of sea surface displacement by atmosphere pressure loading: SSH = SSHNOIBC - SSHIBC. Note: Use SSH for model-data comparisons with altimetry data products that DO apply the IB correction and SSHNOIBC for comparisons with altimetry data products that do NOT apply the IB correction.
Sea surface height anomaly without the inverted barometer (IB) correction
units :
m
comment :
Sea surface height anomaly above the geoid without the inverse barometer (IB) correction, suitable for comparisons with altimetry sea surface height data products that do NOT apply the inverse barometer (IB) correction. Note: SSHNOIBC is calculated by correcting model sea level anomaly ETAN for two effects: a) global mean steric sea level changes related to density changes in the Boussinesq volume-conserving model (Greatbatch correction, see sterGloH), b) sea level displacement due to sea-ice and snow pressure loading (see sIceLoad). In ECCO Version 4 Release 4 the model is forced with atmospheric pressure loading. SSHNOIBC does not correct for the static part of the effect of atmosphere pressure loading on sea surface height (the so-called inverse barometer (IB) correction). Use SSH for comparisons with altimetry data products that DO apply the IB correction.
valid_min :
[-1.66542721]
valid_max :
[1.4550364]
Array
Chunk
Bytes
12.85 MiB
0.99 MiB
Shape
(13, 360, 720)
(1, 360, 720)
Count
39 Tasks
13 Chunks
Type
float32
numpy.ndarray
acknowledgement :
This research was carried out by the Jet Propulsion Laboratory, managed by the California Institute of Technology under a contract with the National Aeronautics and Space Administration.
author :
Ian Fenty and Ou Wang
cdm_data_type :
Grid
comment :
Fields provided on a regular lat-lon grid. They have been mapped to the regular lat-lon grid from the original ECCO lat-lon-cap 90 (llc90) native model grid. SSH (dynamic sea surface height) = SSHNOIBC (dynamic sea surface without the inverse barometer correction) - SSHIBC (inverse barometer correction). The inverted barometer correction accounts for variations in sea surface height due to atmospheric pressure variations.
Conventions :
CF-1.8, ACDD-1.3
coordinates_comment :
Note: the global 'coordinates' attribute describes auxillary coordinates.
creator_email :
ecco-group@mit.edu
creator_institution :
NASA Jet Propulsion Laboratory (JPL)
creator_name :
ECCO Consortium
creator_type :
group
creator_url :
https://ecco-group.org
date_created :
2020-12-18T09:39:51
date_issued :
2020-12-18T09:39:51
date_metadata_modified :
2021-03-15T22:07:49
date_modified :
2021-03-15T22:07:49
geospatial_bounds_crs :
EPSG:4326
geospatial_lat_max :
[90.]
geospatial_lat_min :
[-90.]
geospatial_lat_resolution :
[0.5]
geospatial_lat_units :
degrees_north
geospatial_lon_max :
[180.]
geospatial_lon_min :
[-180.]
geospatial_lon_resolution :
[0.5]
geospatial_lon_units :
degrees_east
history :
Inaugural release of an ECCO Central Estimate solution to PO.DAAC
NASA Physical Oceanography, Cryosphere, Modeling, Analysis, and Prediction (MAP)
project :
Estimating the Circulation and Climate of the Ocean (ECCO)
publisher_email :
podaac@podaac.jpl.nasa.gov
publisher_institution :
PO.DAAC
publisher_name :
Physical Oceanography Distributed Active Archive Center (PO.DAAC)
publisher_type :
institution
publisher_url :
https://podaac.jpl.nasa.gov
references :
ECCO Consortium, Fukumori, I., Wang, O., Fenty, I., Forget, G., Heimbach, P., & Ponte, R. M. 2020. Synopsis of the ECCO Central Production Global Ocean and Sea-Ice State Estimate (Version 4 Release 4). doi:10.5281/zenodo.3765928
source :
The ECCO V4r4 state estimate was produced by fitting a free-running solution of the MITgcm (checkpoint 66g) to satellite and in situ observational data in a least squares sense using the adjoint method
standard_name_vocabulary :
NetCDF Climate and Forecast (CF) Metadata Convention
summary :
This dataset provides monthly-averaged dynamic sea surface height interpolated to a regular 0.5-degree grid from the ECCO Version 4 Release 4 (V4r4) ocean and sea-ice state estimate. Estimating the Circulation and Climate of the Ocean (ECCO) state estimates are dynamically and kinematically-consistent reconstructions of the three-dimensional, time-evolving ocean, sea-ice, and surface atmospheric states. ECCO V4r4 is a free-running solution of a global, nominally 1-degree configuration of the MIT general circulation model (MITgcm) that has been fit to observations in a least-squares sense. Observational data constraints used in V4r4 include sea surface height (SSH) from satellite altimeters [ERS-1/2, TOPEX/Poseidon, GFO, ENVISAT, Jason-1,2,3, CryoSat-2, and SARAL/AltiKa]; sea surface temperature (SST) from satellite radiometers [AVHRR], sea surface salinity (SSS) from the Aquarius satellite radiometer/scatterometer, ocean bottom pressure (OBP) from the GRACE satellite gravimeter; sea-ice concentration from satellite radiometers [SSM/I and SSMIS], and in-situ ocean temperature and salinity measured with conductivity-temperature-depth (CTD) sensors and expendable bathythermographs (XBTs) from several programs [e.g., WOCE, GO-SHIP, Argo, and others] and platforms [e.g., research vessels, gliders, moorings, ice-tethered profilers, and instrumented pinnipeds]. V4r4 covers the period 1992-01-01T12:00:00 to 2018-01-01T00:00:00.
